反应详情

22 g (0.1 mole) of 2,6,10-trimethyl-dodeca-4,8-dien-1-al are dissolved in 20 ml of tetrahydrofuran, 1 g of a palladium/charcoal catalyst (1%) is added and hydrogenation is carried out at 70° C until the absorption of hydrogen has ceased. The catalyst is then filtered off, the solvent distilled off and the residue is fractionated through a descending condenser. 21 g of 2,6,10-trimethyl-dodecan-1-al are obtained (yield, 93% of theory). B.p. = 80° - 81° C at 0.3 mm Hg; nD25 = 1.4456. Odor: bitter, greener and more aldehyde-like orange scent.

1. customhydrogenation is carried out at 70° C until the absorption of hydrogen
2. filtrationThe catalyst is then filtered off
3. distillationthe solvent distilled off
4. customthe residue is fractionated through a descending condenser